This 28 March 2012 post from the NSA internal newsletter SSO Weekly describes the agency’s relationship with AT&T (FAIRVIEW) as “highly collaborative”: see the New York Times article AT&T Helped U.S. Spy on Internet on a Vast Scale, 15 August 2015.

This February 2012 presentation from NSA’s Technology Directorate describes a system codenamed BLUESNORT and its relationship to associated systems: see the Der Spiegel story Prying Eyes: Inside the NSA’s War on Internet Security, 28 December 2014.